If statement, comparing values with = [closed] - php

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Is this if statement correct?
if ($row->totMED="0" or $row->MEDC="0"){
$avgMed='N/A';
}
else {
$avgMed='Medical: $'.($row->totMED / $row->MEDC);
}

Answer 1

You are looking for: $row->totMED == "0" or $row->totMED === "0"
Loose equality
== is loose equality, meaning that the compared values are similar in value. For example, all of these statements are true:
0 == false //true because 0 is like nothing
"" == false //true because an empty string is like nothing
1 == true //true because 1 is something
"abc" == true might be true depending on...things. In php it's true at the moment and in javascript it isn't. That's the problem with loose equality. The checking process can be complicated and the result can be unexpected. Strict equality is good.
Strict equality
===, or strict equality, means same in value AND type. All of these are true:
1 === 1
true === true
'abc' === 'abc'
and these are false:
1 === "1" // first value is integer and second is a string
true === "true" //first value is a boolean and second is a string
Basic assignment operator
A single = is an assignment operator, which sets the variable on the left to the value on the right. When you use =, you're setting the value of the variable, not comparing two values.
$row->totMED = "0" means that $row->totMED now has a value of "0".